Fastening device



' may be inserted within the nut. ture of my invention is of-particularservice with brittle objects such as the holding element to Cil Patentedoct. 19, .15526.

UNITED, lSTATS.

RALPH S. PEIRCE, F H INSDALE, ILLINOIS.

FASTENING DEVIGE.

apmmamnmeanecember s, 192s. serial no. e'zsaus.I

invention relates to fastening devices emp o ying bolts, nuts upon thebolts, and

.holding elements engaging lateral portions of the nuts and serving toeffect the assembly thereof with the 4objects to which the-fasteningvdevices arev to be supplied.

The inventionhas a number-of objects and ladvantages in view. Inaccordance with one feature of `the invention, the nut has an end wallat the inner end of itsbore to serve as a guard to limit the extent towhich the bolt This fea- Where such lfastening devices are assembledglass tops of restaurant tables and counters.

In the preferred embodiment of the inven` tion, the wall at the innerend of the bore of the nut is imperforatel to prevent foreign matterfrom entering the bore of the nut from the recess or hole ing thefastening device.

In accordance with another characteristic of the invention, the holdingelement surrounds the nut and is soft relatively thereto,

and the nutis provided with a roughenedv formation at its wider end forentering the turning therein.

In'accordance with another characteristic of the invention, the -nut iscurved inwardly longitudinally thereof, and in a manner to make the nuttaper from its larger end to its smaller end. The nut may have spreadingengagement with the holdin@r element throughout the `zone where theholding ele' ment surrounds the nut, the curved ing intimate expandingcontact with the' holding element surrounded thereby.

`The invention has other characteristics and will be more fullyexplained'in connection with the accompanying drawing yin which Fig. 1is a longitudinal sectional view of the upper portion of a tableequipped glass top assembled with the balance I with a of the tablestructure by means of the devices of my invention; Fig. 2 is a planviewof the structure shown in Fig. v1;. Fig. 3 is an axial sectionalview through one of the Lfastening devices and contiguous parts, thebolt of the fastening device being shown in elevation; Fig. 4illustrates the 'nut and the holding element that is to'surrou'nd thesame in separated relation; and Fig. 5 is `a view illustrating the nutand holdingelement in assembly as an independent unitin readiness'softer metal in the object receivprevent the nut from,

nut hav-A for the reception ofthe fastening bolt when The fasteningdevice illustratedincludes a u threaded bolt 1 having a"'nut 2 threadedthereon and provided with a holding element lengaged by a lateralportion of the nut, the nut being of wedgii formation to press outwardlyupon the ho ding element. 3 The nut may be of hard metal, such as brassor iron. The holding element may completely surround the nut and isdesirably formed of such as lead. vThe nut and the holding formation arefirst 'assembled with the object, such as the glass table top 4 which isformed with a hole tov receive the nut and holding element; A suitablestaking tool having an annular end, is placed upon the outer end of theholding element and is then pounded by ahammer to crowd it between thenut and the surrounding object 4. The nut, being of wedging formation,causes the material of the holding element to be crowded into the spacebetween the nut and the surrounding object 4 whereby thenut is broughtinto assembly with such object and is held in position to vadmit thebolt 1 to be inserted therein. .The'bolt, in the example illustrated, ispassed through a strut 6 extending between the opposite aprons 7 of thetable whereby the glass top 4 may be firmly assembled with this strut.As illustrated, there aretwo such' struts 6 with whichthe table top isthusassembled.

In order that each. hole in the glass table top may not need to beextended entirely therethrough to mar the appearance thereof, I providemeans whereby each bolt cannot be screwed through its nut to an extentto reach to prevent that recelves the nut may not enterthe nut,` l

I desirably within its holding element 3 when the inner end of the' boltreaches the inner end of the extend this wall entirely across the boreof the nut and make it imperforate. In order that the nut may not beturned 1 nut I provide the nut with a roughened formation at its widerend, this roughened formation entering the holding element andpreventing the nut from turning therein.

The nut is desirably annular in its various cross Sections and isinwardly curved longi-l `tudinally thereof.

This curving formation affords uniform engagement between the nut andits holding element throughout the zone. in which the nut is surrounded.by the holding element so that when the holding element is poundedV intoplace it is subjecteto uniform crowding action and exerts firm holdingengagement with the nut throughout the zone lin which the nut issurrounded thereby. In

nut and its holding elementv order that the may be supplied as a unitarystruc-ture apart from the complemental bolt, I form the nut' with anindentation 8, this indentation being preferably annular. The holdingelementis` `placed upon the nut and is sufficiently compressed to have aportion thereof eXuded into the indentation. The indentationy delsirably has a surface 9 that slopes toward the l rious lengths of b`oltsan wider end of the nut and a shoulder' 10. that prevents theholdingelement from being withdrawn from the nut after having once beenassembled therewith.

In the preferred embodiment of the invention the nut is formed withanextension 11 at its smaller end whose exterior longitudilnal surfaceis parallel with the axis of the be adapted to vavarious lengths of theholding element without interfering with the assembly of the holdingelements and nuts.

I claim: l

1. In a fastening device, the combination with a threaded bolt; of a nutthreaded upon said bolt; and a holding element surnut whereby thesnlitmag rounding said nut and soft relatively thereto, said nut being ofwedging formation where engaging said holding'element and having a.roughened formation atri-.ts wider.

end for entering said holding element to prevent the nut fromturningtherein.

` 2. In a fastening device, the combination with a nut; of a holdingelement -surrounding said nut and soft relatively thereto, said nutbeing of wedging formation where engaging said holding element, said-nuthaving' an indentation upon its side tha-treceives a portion of theholding element that maintains the holding element and nut in assembly.

3. In a fastening device, the combina-tion with a nut; of a holdingelement surroundbly,

1,eos,29a

ing said nut and4 soft relatively thereto, said nut being of wedgingformation where 'engaging said holding element, said nut having anindentation upon its side that receives' a portion of the holdingelement that main' Vtains the holding element and-nut in assembly, saidindentation sloping at one end'toward the larger end lof the nut.

` 4. In a fastening device, the combination witha nut; of a holdingelement surrounding said nut and soft relatively thereto, said nut beingof wedging formation where engaging said holding element, said nuthaving an indentation u on its side that receives a portion of theholding element that maintains the holding element and nut in assemsaidindentation sloping atl one -endtoward the larger end of the nut andterminating at its otherr end in a'shoulder.

5 In a fastening. device, the combination with a nut having animper'forate end wall at the inner end' of itsv bore; of a holdingelement surrounding said nut and soft relatively, thereto, saidnutbeing' of wedging formation where engaging said holding element, saidnut havmg an annular indentation u ponits side that receivesy a portionof the holding element that maintains the holdingelement and nut inassembly.

6. In a fastening device, thecombination with a nut having' animperforate end wall at the inner end of its bore; of a holding elementsurr unding said nut and 'soft relatively there o, said nut `being ofwedging formation where engaging said holding element, said nut havingan annular indentation upon its side that receives a portion o theholding element that maintains the holding element and nut in assembly,saidindentation sloping at one end toward the larger end of the nut and.terminating at its other end in a shoulder.

7 In a fastening device, the combination RALPH- s. PEIRCE.

